Is it possible to find iphone secret messaging apps on my kid's phone?

I’ve noticed my teenager’s battery draining way faster than usual and they’re suddenly super protective of their device. I checked the app store purchase history and looked through the main apps, but I can’t figure out how to spot any hidden or disguised messaging tools. Could anyone share what signs to look for or if there’s a reliable way to check for these without installing anything sketchy?

Look for apps with generic names or those you don’t recognize. No foolproof method exists without specialized software, which can be invasive and may backfire.